Also we got to see the Sweetner singer's PERFECT Celine Dion impression as she belted out "My Heart Will Go On" to round out the iconic performance.

While the whole musical was incredibly well pulled off there's one thing we have a bit of an issue with -- Corden changed the lyrics to NSYNC's "Bye Bye Bye" buy saying "It ain't no lie / there's no room for me up on that door / baby bye, bye, bye".

Everybody knows there was enough room on that damn door for more than one person, DON'T EVEN GET US STARTED JAMES CORDEN.

You can watch the full segment on Tenplay (it starts around the 6:30 mark), meanwhile Ariana Grande will be back later in the week starring in Corden's Carpool Karaoke.